/*
 * Type-safe wrapper for WebGL in GWT.
 * 
 * Copyright (C) 2009 Hao Nguyen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package gwt.g3d.client.shader;

import gwt.g3d.client.gl2.GL2;
import gwt.g3d.client.gl2.GLDisposable;

public interface Shader extends GLDisposable {

  /**
   * Binds this shader program to WebGL.
   * This shader will remain active until another shader bind to gl.
   */
  void bind();
  
  /**
   * Initializes the shader.
   * A shader can only used after it is initialized.
   * If a shader is disposed, it can be used again when init is called.
   * 
   * @param gl the active GL context. 
   */
  void init(GL2 gl) throws ShaderException;
}
